Class 10 Science Chapter 11 Important Questions Electricity
Important questions for Electricity Chapter 11 Class 10 Science with solutions. Extra questions for class 10 Science Chapter 11.
Q1:
Consider the following electrical circuit diagram in which nine identical resistors of 3Ω each are connected as shown. If the reading of the ammeter A\(_1\) is 1 ampere, answer the following questions :
(a) What is the relationship between the readings of A\(_1\) and A\(_3\) ? Give reasons for your answer. (b) What is the relationship between the readings of A\(_2\) and A\(_3\) ? OR (c) Find the total resistance of the circuit.
CBSE [2023]
HardQ2:
V I graph for two conducting wires A and B are as shown. If both wires are of the same length and same diameter, which of the two is made of a material of high resistivity ? Give reasons to justify your answer.
CBSE [2023]
MediumQ3:
In a resistive circuit if the current is increased to two times, the percentage change in the amount of heat dissipated in the circuit would be :
(a) 400% (b) 300% (c) 200% (d) 100%
CBSE [2023]
EasyQ4:
If four identical resistors, of resistance 8 ohm, are first connected in series so as to give an effective resistance \(R_s\), and then connected in parallel so as to give an effective resistance \(R_p\) then the ratio \(\frac{R_s}{R_p}\) is
(a) 32 (b) 2 (c) 0.5 (d) 16
CBSE [2023]
MediumQ5:
Find the resistivity of the material of a metallic conductor of length 2 m and area of cross-section 1.4 × 10\(^{-6}\) m\(^2\). The resistance of the conductor is 0.04 ohm.
CBSE [2022]
MediumQ6:
Study the following circuit and find:
(i) Effective resistance of the circuit (ii) Current drawn from the battery (iii) Potential difference across the 5 Ω resistor
CBSE [2022]
MediumQ7:
An electric motor rated 1100 W is connected to 220 V mains. Find: (i) The current drawn from the mains. (ii) Electric energy consumed if the motor is used for 5 hours daily for 6 days. (iii) Total cost of energy consumed if the rate of one units is ₹ 5.
CBSE [2022]
MediumQ8:
Study the following electric circuit in which the resistors are arranged in three arms A, B and C :
(a) Find the equivalent resistance of arm A. (b) Calculate the equivalent resistance of the parallel combination of the arms B and C. (c) (i) Determine the current that flows through the ammeter. OR (ii) Determine the current that flows in the ammeter when the arm B is withdrawn from the circuit.
CBSE [2022]
MediumQ9:
Calculate the equivalent resistance of the following electric circuit :
CBSE [2022]
MediumQ10:
A 5 resistor is connected across a battery of 6 volts. Calculate the energy that dissipates as heat in 10 s.
CBSE [2022]
EasyQ11:
Two bulbs rated 100 W; 220 V and 60 W; 220 V are connected in parallel to an electric mains of 220 V. Find the current drawn by the bulbs from the mains.
CBSE [2022]
MediumQ12:
Three resistors R₁ R₂ and R₃ are connected in parallel and the combination is connected to a battery, an ammeter, a voltmeter and a key. Draw suitable circuit diagram to show the arrangement of these circuit components along with the direction of current flowing.
CBSE [2022]
EasyQ13:
Calculate the equivalent resistance of the following network :
