81
When several resistances are added to . . . . . . . ., their combined resistance is less than the minimum resistance among them?
A)
parallel
B)
box
C)
horizontal
D)
series
Answer & Solution
Answer: Option
A
82
Faraday's Laws are consequence of conservative of
A)
energy
B)
energy and magnetic field
C)
charge
D)
magnetic field
Answer & Solution
Answer: Option
A
83
If the potential difference and current through a circuit are doubled, the resistance of the circuit is:
A)
increases
B)
becomes zero
C)
remains the same
D)
decreases
Answer & Solution
Answer: Option
C
84
Which of the following is not an example of the heating effect of current?
A)
Electric iron
B)
Working of a fan
C)
Bulb
D)
Electric kettle
Answer & Solution
Answer: Option
B
85
The SI unit of electric dipole moment is
A)
Volt
B)
Joule
C)
Coulomb/m
D)
Coulomb-m
Answer & Solution
Answer: Option
D
86
A current carrying conductor is associated with
A)
a magnetic field
B)
an electric field
C)
an electromagnetic field
D)
an electrostatic field
Answer & Solution
Answer: Option
A
87
The electrical circuit consists of . . . . . . . .
A)
Electrical components, connective wires and plug keys
B)
Electrical components, connective wires and cells (batteries)
C)
Electrical components and connective wires
D)
Electrical components, connective wires, cells (batteries) and plug keys
Answer & Solution
Answer: Option
D
88
Assertion (A): The temperature of a metal wire rises when an electric current is passed through it.Reason (R): Collision of metal atoms with each other releases heat energy.
A)
Both (A) and (R) are true and (R) is the correct explanation of (A)
B)
Both (A) and (R) are true, but (R) is not the correct explanation of (A)
C)
(A) is true, but (R) is false
D)
(A) is false, but (R) is true
Answer & Solution
Answer: Option
C
89
An electric bulb is connected to a 220 V generator. The current generated through it is 0.50A. How much power is the bulb?
A)
110 Pa
B)
110 N
C)
110 W
D)
110 J
Answer & Solution
Answer: Option
C
90
An electrical device consumes 1000 joules of energy in a second. If it runs for one hour, what will be the amount of electricity consumed by it?
A)
It will consume 1 unit of electricity, i.e 10 kWh of electricity
B)
It will consume 1 unit of electricity, i.e 100 kWh of electricity
C)
It will consume 1 unit of electricity, i.e 1 Wh of electricity
D)
It will consume 1 unit of electricity, i.e 1 kWh of electricity
Answer & Solution
Answer: Option
D
