(Practice) MCQ of Electricity
|
1.Electricity constituted by electric charges at rest on the surface of a conductor is called
|
a. Electricity b. Potential difference c. Current electricity d. Static electricity
|
2.The closed path between two points at different potentials, to make the electric current flow is called
|
a. Electric circuit b. Electric current c. Electric potential d. Electric cell.
|
3. Direction of conventional current is taken from a. Negative to positive b. Positive to negative
|
c. It could be from positive to negative or negative to positive d. None of these.
|
4. With increase in temperature, resistance of a conductor
|
a. Decreases b. Increases
|
c . May decreases or increases depending on temperature
|
d. It does not depend on temperature.
|
5. In series combination, resistance increases due to increase in
|
a. Temperature b Humidity c. Length d. Area of cross-section.
|
6. In parallel combination, resistance decreases due to increase in
|
a. Temperature b. Humidity c. Area of cross-section d. Length.
|
7. The rate at which electricity is dissipated or consumed by an appliance is called electrical
|
a. current b. Power c. Potential d. Energy.
|
8. The unit of electrical power is
|
a. watt b. ampere c. joule d. ohm.
|
9. In series combination of electrical appliances, total electrical power
|
a. Increases b. Decreases c. May increases or decreases d. Does not changes.
|
20.The equivalent resistance in series combination is
|
a. Smaller than the resistance having high value
|
b .Larger than the largest resistance
|
c. Smaller than the smallest resistance
|
d. Larger than the smallest resistance.
|
21.In a circuit containing two unequal resistors connected in parallel
|
a. The current is same in both resistors
|
b. The current is large in the resistance having more value
|
c. The voltage is same across both the resistors
|
d .The voltage drops is larger across both the resistors.
|
22.. A fuse wire is always inserted in the
|
a. Live wire b. In the neutral wire c. In the earth wire d. May be connected in any line.
|
23. Two bulbs in a house, one glow brighter than the other. The bulb with large resistance is
|
a. Dim bulb b. The brighter bulb c. Both has same resistance d. None of these.
|
24.The characteristics of fuse wire is
|
a. High melting point b Low melting point
|
c. Low resistivity and high melting point d. High resistivity and low melting point.
|
25.The unit of specific resistance is
|
A .Ohm/m2 b. Ohm-m c. Ohm m3 d. Ohm/m3
|
ANSWERS : Q1.d Q2.a Q3.b Q4.b Q5.c Q6.c Q7.b Q8.a
|
Q9.b Q10.a Q11c. 12.b Q13.b Q14.b Q15.b Q16.c Q17.b
|
Q18.b Q19.c Q20.b Q21.c Q22.a Q23.a Q24.d Q25.b
|
For more click CBSE PHYSICS: X MCQ On Electricity:
|