C-11 — Current Electricity

What is the flow of charge through a conductor called?

In which chapter was static electricity discussed?

Which of the following devices is operated by current electricity?

Electric current flows from a body of —

The flow of charge between two charged bodies continues until —

If the two plates of a charged capacitor are joined by a wire, then —

To get a continuous flow of electricity we need —

The electromotive force (EMF) of a battery is defined as —

The unit of electromotive force is —

The potential difference of an ordinary dry cell is —

Inside a battery cell, the potential difference is produced by —

EMF is —

Two 1.5 V cells joined positive-to-negative produce a total voltage of —

When the chemical substances inside a cell are exhausted, the cell —

If 6 J of work is needed to bring 2 C of charge from the low to the high potential terminal of a cell, the EMF of the cell is —

Which of the following is a good conductor?

Which of the following is an insulator?

Which of the following is an example of a semiconductor?

Charge transfer through a metallic conductor occurs due to —

The conductivity of a semiconductor at normal temperature lies between that of —

With a rise of temperature, the conductivity of a semiconductor —

Mainly which class of materials behave as insulators?

The expression for electric current is —

The SI unit of electric current is —

1 coulomb is the charge transferred when —

The direction of conventional electric current is —

If 1 A of current flows from A to B, then in reality electrons move —

Increasing the deficiency of electrons at a point amounts to —

If 5 C of charge passes through a wire in 10 s, the current is —

For the same applied potential difference, the current through different conductors depends on —

Reversing the direction of the applied potential difference changes —

Ohm's law can be written as —

The instrument used to measure potential difference is —

The instrument used to measure electric current is —

The unit of resistance is —

If 1 V applied to a circuit produces 1 A of current, the resistance of the circuit is —

On an $I$ vs $V$ graph for an ohmic conductor, the slope represents —

Two ohmic wires A and B are tested. The slope of the $I$–$V$ line for A is greater than that of B. So —

The potential difference across a conductor is 100 V and the current through it is 10 A. Its resistance is —

The expression for the resistance of a uniform wire is —

If the length of a conductor is doubled keeping area and material unchanged, its resistance —

If the cross-sectional area of a wire is doubled, its resistance —

The unit of specific resistance ($\rho$) is —

Conductivity $\sigma$ is defined as —

The unit of conductivity is —

A resistance whose value can be changed within a range is called —

The total number of terminals in a rheostat is —

The colour bands on a fixed resistor indicate its —

With a rise of temperature, the resistance of a metallic conductor —

With a rise of temperature, the resistance of a semiconductor —

Resistance of a metal increases with temperature mainly because —

From Table 11.01, which substance has the highest specific resistance?

From the worked example, the specific resistance of copper is approximately —

Using a wire of radius 0.1 mm, the length needed to make a 1 $\Omega$ nichrome resistor is approximately —

Why must the temperature be specified while stating the resistance of a substance?

The symbol —||— represents —

A zigzag line in a circuit diagram represents —

A circle with the letter A inside represents —

A circle with the letter V inside represents —

The amount of current that comes out of the source equals the amount that returns to the source, because —

At any junction in a circuit, the current entering equals the current leaving, because —

Ohm's law applied to any part of a circuit means —

In Figure 11.09(a), $V = 3$ V, $R_1 = 1\,\Omega$ and $R_2 = 2\,\Omega$ in series. The current is —

In Figure 11.09(a), the voltage at point B is —

In Figure 11.09(b), $V = 6$ V with three series resistors $5\,\Omega$, $10\,\Omega$ and $15\,\Omega$. The circuit current is —

In Figure 11.09(b), the voltage at point B is —

In Figure 11.09(b), no current flows through the BE branch. The voltage at E is —

In Figure 11.09(b), the voltage at point C is —

In Figure 11.10, $R_1 = 3\,\Omega$ and $R_2 = 6\,\Omega$ are in parallel across 2 V. Current through $R_1$ is —

Total current supplied by the battery in Figure 11.10 is —

The resistance of a connecting copper wire is ignored in circuit analysis because —

A circle with the letter G inside represents —

For resistors in series, the equivalent resistance is —

In a series circuit, the current through each resistor is —

Three resistors of $2\,\Omega$, $3\,\Omega$ and $4\,\Omega$ are connected in series. Equivalent resistance is —

Two equal resistors of $R$ each, connected in series, give an equivalent resistance of —

Adding more resistors in series —

For resistors in parallel, the equivalent resistance is given by —

Two equal resistors of $R$ each in parallel have equivalent resistance —

In a parallel combination, the potential difference across each resistor is —

Two resistors of $3\,\Omega$ and $6\,\Omega$ in parallel give an equivalent resistance of —

Adding more resistors in parallel —

Electric power is given by —

Power dissipated in a resistor of resistance $R$ carrying current $I$ is —

Power in terms of voltage $V$ and resistance $R$ is —

The electrical energy supplied in time $t$ is —

The unit of electrical energy used in domestic billing is —

1 kilowatt-hour is also called —

The resistance of the filament of a 220 V, 100 W bulb is —

The current through a 220 V, 100 W bulb is approximately —

A 60 W bulb is lit for 5 hours daily over 30 days. Total energy used is —

With a cost of 10 taka per unit, the bill for the above 60 W bulb (5 h × 30 days) is —

In a filament bulb, a large fraction of electrical energy is converted to —

Electricity is transmitted at very high voltage in order to —

If the transmission voltage is increased 10 times for the same delivered power, the current becomes —

If the transmission voltage is increased 10 times, the heat loss in the line becomes —

The reason $V^2/R$ does NOT predict a 100× increase in line loss when the transmission voltage is raised 10× is that —

The energy lost as heat in transmission wires is called —

To reduce system loss, electricity is transmitted at —

Load shedding means —

Load shedding is done in rotation across different areas because —

The voltage of household electricity supplied in our country is —

The smallest current passing directly through the heart that can cause death is about —

The resistance of dry human skin is approximately —

When the skin gets wet, its resistance —

Open electrical wires are covered with —

A short circuit is a condition where —

The function of a fuse is to —

A circuit breaker —

A switch is best connected to the —

The earth (ground) wire of an electrical appliance is generally connected to —

The two wires in a household electric supply line are —

An electrocuted person cannot move because —

Using a hair drier or electric iron near water is dangerous because —

In Figure 11.17, the live wire is marked in —

The neutral wire in the household circuit diagram is marked in —

In Figure 11.17, the 5 A circuit breaker supplies —

The 15 A circuit breaker is connected to —

The 30 A circuit breaker is connected to —

The function of the electric meter in a house is to —

By turning off the main switch we can —

In the household ring main of Figure 11.17, the ground (earth) wire is shown in —

What are the materials through which electric current can flow very easily?

If three resistances of values $2\,\Omega$, $3\,\Omega$ and $4\,\Omega$ are connected in series, then what will be the equivalent resistance?

The potential difference between the two terminals of a conductor is 100 V. If the amount of current flowing through it is 10 A, what will its resistance be?

The electrical condition of a circuit is measured by —

Based on the circuit of Figure 11.19, what is the equivalent resistance of the circuit?

According to the stem of Figure 11.19 —

If the length of a conductor is increased 5 times keeping material, area and temperature unchanged, its resistance becomes —

The current through Alif's 220 V, 40 W table lamp is —

Total energy used by Alvi (220 V, 100 W bulb, 3 h/day, 30 days) is —

Total energy used by Alif (220 V, 40 W lamp, 4 h/day, 30 days) is —

With a price of 6 taka per unit, who is more economical?

The statement 'EMF of a dry cell is 1.5 V' means —

If a 484 $\Omega$ filament bulb is connected to a 220 V supply line, the current is —

To verify the marking '220 V – 100 W' on a bulb, the simplest experimental approach is to —

The main reason for using high voltage to transmit electricity over long distances is to —

Ohm's law is valid —

The resistance of a conductor increases with temperature because —

Electrical system loss in transmission means —