Electricity Test

Result

Electricity Test - 6

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The SI unit of power is ________

A
KJ (Kilojoule)

B
N (Newton)

C
W (Watt)

D
N-m (Newton meter)

Solution

The SI unit of electric power is watt (W). It is the power consumed by a device that carries 1 A of current when operated at a potential difference of 1 V.
Question 2
1 / -0

An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?

A
120 W

B
110 W

C
60 W

D
220 W

Solution

The electric power dissipated by an electric bulb is given by,

Power = Voltage × Current

P = VI = 220 V × 0.50 A = 110 J/s = 110 W.
Question 3
1 / -0

An electric refrigerator rated 400 W operates 8 hours/day. What is the cost of the energy to operate it for 30 days at ₹ 3.00 per kW h?

A
₹ 320

B
₹ 288

C
₹ 120

D
₹ 300

Solution

The total energy consumed by the refrigerator in 30 days would be

400 W × 8.0 hours/day × 30 days = 96000 W h = 96 kW h

Thus the cost of energy to operate the refrigerator for 30 days is 96 kW h × ₹ 3.00 per kW h = ₹ 288.00
Question 4
1 / -0

The __________ is defined as the total amount of charge flowing through a wires of certain cross-section area per unit time,

A
Electric potential

B
Electric field

C
Electric charge

D
Electric current

Solution

The electric current is expressed as the total amount of charge flowing through a conductor per unit time. If certain amount of charge is flowing across the cross-section of a wire per unit time, it is said that the conductor has current.
Question 5
1 / -0

An instrument called _________ measures electric current in a circuit. It is always connected in _______ in a circuit through which the current is to be measured.

A
voltmeter, parallel

B
tachometer, series

C
Ammeter, parallel

D
Ammeter, series

Solution

An instrument called ammeter measures electric current in a circuit. It is always connected in series in a circuit through which the current is to be measured

An ammeter is used to measure the amount of current flowing in a circuit to analyze the circuit. It is always connected in series with the load, otherwise the ammeter malfunctions.