Current Electricity-Electrical Energy and Power (BITSAT Physics): Questions 1 - 5 of 7

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 313 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 250.00 or

Question number: 1

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

If current flowing in a conductor changes by 1% , then power will change by –

Choices

Choice (4) Response

a.

10%

b.

2%

c.

1%

d.

100%

Question number: 2

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

10Ω electric heater operates on a 110V line, then the rate at which it develops heat in watts will be –

Choices

Choice (4) Response

a.

670

b.

810

c.

1210

d.

1310

Question number: 3

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

Two identical batteries, each of emf 2volt and internal resistance R=0.5Ω by passing a current through it. The maximum power that can be developed across R using these batteries is –

A circuit diagram three resistors and two batteries

A Circuit Diagram Three Resistors and Two Batteries

In circuit diagram three resistors and two batteries are shown.

Choices

Choice (4) Response

a.

4W

b.

3.2W

c.

2W

d.

8.2W

Question number: 4

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

Kinetic energy of an electron accelerated in a potential difference of 100V is

Choices

Choice (4) Response

a.

1.6×1029J

b.

1.6×1034J

c.

1.6×1021J

d.

1.6×1017J

Question number: 5

» Current Electricity » Electrical Energy and Power

MCQ▾

Question

A heater coil connected to a supply of a 220V dissipating some power p1 . The coil is cut into half and the two halves are connected in parallel. The heater now dissipates a power p2 the ration of power p1:p2 is –

Choices

Choice (4) Response

a.

1:2

b.

2:1

c.

4:1

d.

1:4

f Page
Sign In