Physics Test 42

Result

Physics Test 42

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Question 1
4 / -1

An electric heating element consumes 300W when connected to a 100V line. If the line voltage becomes 150V, the power consumed will be-

A
1125 W

B
675 W

C
337.5 W

D
562.5 W

Solution

P = V²/R
Question 2
4 / -1

A capacitor of capacitance C₁ = 1μF, charged up to a voltage V = 110V is connected in parallel to the terminals of a circuit consisting of two uncharged capacitors connected in series and possessing capacitance C₂ = 2μF and C₃ = 3μF. Then the amount of charge that will flow through the connecting wire :-

A
40μF

B
50μC

C
60μC

D
10μC
Question 3
4 / -1

If a beta particle enters in magnetic and electric field with its velocity pointing in the same direction as electric and magnetic field then :

A
Beta particle will turn towards right

B
Beta particle will turn towards left

C
Velocity of beta particle will decrease

D
Velocity of beta particle will remain unchanged
Question 4
4 / -1

When a long spring is stretched by 2cm, its potential energy is U. If the spring is stretched by 10cm, the potential energy stored in it will be

A
25U

B
U/5

C
5U

D
10U