Chapter 3: Current Electricity Physics Mcqs for High School - Grade 10 - Set 1

1)   Substances that have constant resistance over a wide range of voltages are

a. ohmic
b. non ohmic
c. resistive
d. non resistive
Answer  Explanation 

ANSWER: ohmic

Explanation:
No explanation is available for this question!


2)   A resistor having resistance 6.2Ω is connected across a battery of 5 V using a wire of negotiable resistance. Current passes through the resistor are 0.4 A. The total power produced by the battery is

a. 2 W
b. 3 W
c. 5 W
d. 6 W
Answer  Explanation 

ANSWER: 2 W

Explanation:
No explanation is available for this question!


3)   As compare to short wires, long wires have

a. more resistance
b. no resistance
c. less resistance
d. same resistance
Answer  Explanation 

ANSWER: more resistance

Explanation:
No explanation is available for this question!


4)   The device that disconnects the supply automatically if current exceeds the normal value is known as

a. circuit breaker
b. fuse
c. cable
d. capacitor
Answer  Explanation 

ANSWER: circuit breaker

Explanation:
No explanation is available for this question!


5)   As per Ohm's law, V (potential difference) is equal to

a. I(current)×R(resistance of the conductors)
b. I(current)/R(resistance of the conductors)
c. R(resistance of the conductors)/I(current)
d. I(current) + R(resistance of the conductors)
Answer  Explanation 

ANSWER: I(current)×R(resistance of the conductors)

Explanation:
No explanation is available for this question!


6)   Ohm is denoted by the symbol

a. π
b. Ω
c. θ
d. λ
Answer  Explanation 

ANSWER: Ω

Explanation:
No explanation is available for this question!


7)   The wire maintained at zero potential by connecting it to the Earth at the power station itself is called

a. Earth/ground wire
b. livewire
c. neutral wire
d. delta wire
Answer  Explanation 

ANSWER: neutral wire

Explanation:
No explanation is available for this question!


8)   Watt is equal to one

a. joule per second
b. meter per second
c. ampere per second
d. farad per second
Answer  Explanation 

ANSWER: joule per second

Explanation:
No explanation is available for this question!


9)   The resistance and length of wire are

a. inversely related
b. directly related
c. not related
d. inversely proportional
Answer  Explanation 

ANSWER: directly related

Explanation:
No explanation is available for this question!


10)   All electric wires are well insulated for the purpose of safety with some

a. iron cover
b. glass cover
c. plastic cover
d. wood cover
Answer  Explanation 

ANSWER: plastic cover

Explanation:
No explanation is available for this question!


11)   The property of a substance which offers opposition to the flow of current through it is called

a. energy
b. capacity
c. resistance
d. voltage
Answer  Explanation 

ANSWER: resistance

Explanation:
No explanation is available for this question!


12)   The time a current of 30 mA takes to deliver 30 C charge is

a. 0.3 s
b. 0.003 s
c. 0.4 s
d. 0.5 s
Answer  Explanation 

ANSWER: 0.003 s

Explanation:
No explanation is available for this question!


13)   The electric power enters our house through

a. ground wire
b. neutral wire
c. live wire
d. all of above
Answer  Explanation 

ANSWER: all of above

Explanation:
No explanation is available for this question!


14)   Insulators can be easily charged by

a. supplying electrons
b. Electromotive force (EMF)
c. friction
d. protons
Answer  Explanation 

ANSWER: friction

Explanation:
No explanation is available for this question!


15)   If 2 resistors of 5kΩ and 7kΩ are connected in series across a 15V battery, then the current flowing through each of the resistance should be

a. 2mA
b. 3.6mA
c. 5mA
d. 1.25mA
Answer  Explanation 

ANSWER: 1.25mA

Explanation:
No explanation is available for this question!


16)   The wires carrying electricity are covered with good insulator, called

a. fuse
b. circuit
c. rope
d. cable
Answer  Explanation 

ANSWER: cable

Explanation:
No explanation is available for this question!


17)   To pass the current through ammeter it should be connected in

a. parallel in circuit
b. series in circuit
c. direct circuit
d. alternating circuit
Answer  Explanation 

ANSWER: series in circuit

Explanation:
No explanation is available for this question!


18)   The rate of flow of charges is called

a. static charge
b. electric current
c. Electromotive force (EMF)
d. coulomb's force
Answer  Explanation 

ANSWER: electric current

Explanation:
No explanation is available for this question!


19)   Potential difference across ends of conductor causes loss of

a. mechanical energy
b. electrical energy
c. potential energy
d. gravitational energy
Answer  Explanation 

ANSWER: electrical energy

Explanation:
No explanation is available for this question!


20)   The SI unit of current is

a. charge
b. ohm
c. volt
d. ampere
Answer  Explanation 

ANSWER: ampere

Explanation:
No explanation is available for this question!