Physics Test 35

Result

Physics Test 35

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Question 1
4 / -1

If a body is executing simple harmonic motion, then :-

A
at extreme position, the total energy must be zero

B
at equilibrium position, the total energy is in the form of only potential energy

C
at equilibrium position, the total energy is in the form of only kinetic energy

D
at extreme position, the total energy is only potential energy

Solution

At extreme position kinetic energy is zero, total energy in the form of potential energy.

At equilibrium kinetic energy is maximum but potential energy may or may not be zero. (Example vertical oscilations of spring)
Question 2
4 / -1

One kilowatt hour is equal to :–

A
3.6 × 10⁶ Joule

B
3.6 × 10⁵ Joule

C
10³ Joule

D
10⁷ Joule

Solution

1 kilo watt hour = 10³ × 3600 Joule

= 3.6 × 10⁶ joule
Question 3
4 / -1

A carbon resistor is marked with the rings coloured brown, black, green and gold. The resistance (in ohm) is :

A
3.2 × 10⁵ ± 5%

B
1 × 10⁶ ± 10%

C
1 × 10⁷ ± 5%

D
1 × 10⁶ ± 5%

Solution

Brown.Black × 10 Green ± Gold

⇒ 10 × 10⁵ ± 5% ⇒ 10⁶ ± 5%