Worksheet

Post your Learning Need Signup as a Tutor

Popular Cities

Bangalore

Hyderabad

Delhi

Mumbai

Chennai

Pune

Kolkata

Gurgaon

Ahmedabad

Jaipur

Noida

Your Worksheet is Ready

CBSE - Class 12 Physics Current Electricity Worksheet

What is the full fom of LED?

Light Emitting Diode

Light Emission Diode

Determine the current in each branch of the network shown in the figure:

At room temperature (27.0 °C) the resistance of a heating element is $100 \Omega$. What is the temperature of the element if the resistance is found to be $117 \Omega$, given that the temperature coefficient of the material of the resistor is $1.70 \times 10^{-4} °C^{-1}$.

A battery of emf 10 V and internal resistance $3 \Omega$ is connected to a resistor. If the current in the circuit is 0.5 A, what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

A storage battery of emf (8.0 \text{ V}) and internal resistance (0.5 \Omega) is being charged by a (120 \text{ V}) dc supply using a series resistor of (15.5 \Omega). What is the terminal voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit?

The storage battery of a car has an emf of (12 \text{ V}). If the internal resistance of the battery is (0.4 \Omega), what is the maximum current that can be drawn from the battery?

A silver wire has a resistance of $2.1 \Omega$ at 27.5 °C, and a resistance of $2.7 \Omega$ at 100 °C. Determine the temperature coefficient of resistivity of silver.

A battery of emf (10 \text{ V}) and internal resistance (3 \Omega) is connected to a resistor. If the current in the circuit is (0.5 \text{ A}), what is the resistance of the resistor? What is the terminal voltage of the battery when the circuit is closed?

Calculate the equivalent resistance between the point A and B of the presented circuit.

$\frac{1}{3} \Omega$

$\frac{4}{3} \Omega$

$\frac{3}{2} \Omega$

$\frac{2}{3} \Omega$

10.

Two resistances R1 and R2 are connected in series. The total resistance is

R = R1 – R2

R = (R1 + R2)/R1 x R2

R = R1 x R2/(R1 + R2)

R = R1 + R2

11.

At room temperature ((27.0 \text{ °C})) the resistance of a heating element is (100 \Omega). What is the temperature of the element if the resistance is found to be (117 \Omega), given that the temperature coefficient of the material of the resistor is (1.70 \times 10^{-4} \text{ °C}^{-1}).

12.

A negligibly small current is passed through a wire of length 15 m and uniform cross-section $6.0 \times 10^{-7} m^2$, and its resistance is measured to be $5.0 \Omega$. What is the resistivity of the material at the temperature of the experiment?

13.

Find the equivalent resistance between the terminal A and B of the presented figure.

4.0 Ω

2.0 Ω

8.0 Ω

6.0 Ω

14.

Determine the current in each branch of the network shown in Fig. 3.20:

15.

Determine the equivalent resistance between the terminal A and B of the presented figure.

$\frac{25}{4} \Omega$

$\frac{25}{8} \Omega$

$\frac{5}{4} \Omega$

None of these

16.

A storage battery of emf 8.0 V and internal resistance $0.5 \Omega$ is being charged by a 120 V dc supply using a series resistor of $15.5 \Omega$. What is the terminal voltage of the battery during charging? What is the purpose of having a series resistor in the charging circuit?

17.

The number density of free electrons in a copper conductor estimated in Example 3.1 is $8.5 \times 10^{28} m^{-3}$. How long does an electron take to drift from one end of a wire 3.0 m long to its other end? The area of cross-section of the wire is $2.0 \times 10^{-6} m^2$ and it is carrying a current of 3.0 A.

18.

A negligibly small current is passed through a wire of length (15 \text{ m}) and uniform cross-section (6.0 \times 10^{-7} \text{ m}^{2}), and its resistance is measured to be (5.0 \Omega). What is the resistivity of the material at the temperature of the experiment?

19.

20.

The number density of free electrons in a copper conductor is (8.5 \times 10^{28} \text{ m}^{-3}). How long does an electron take to drift from one end of a wire (3.0 \text{ m}) long to its other end? The area of cross-section of the wire is (2.0 \times 10^{-6} \text{ m}^{2}) and it is carrying a current of (3.0 \text{ A}).

Worksheet Answers

Option A

Option D

10.

Option D

13.

Option A

15.

Option B

19.

Option C

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All

Decline All