Physics Test 33

Result

Physics Test 33

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Weekly Quiz Competition

Question 1
4 / -1

In an LCR series a.c. circuit, the voltage across each of the components, L, C and R is 50 V. The voltage across the LC combination will be

A
50 V

B
50√2 V

C
100 V

D
0 V(zero)

Solution

In series LCR circuit, the voltage across the inductor (L) and the capacitor (C) are in opposite phase.
Question 2
4 / -1

This question has statement 1 and statement 2. Of the four choices given after the statements, choose the one that best describes the two statements
Statements 1: Davisson – germer experiment established the wave nature of electrons
Statement 2: If electrons have wave nature, they can interfere and show diffraction.

A
Statement 1 is false, Statement 2 is true

B
Statement 1is true, Statement 2 is false

C
Statement 1 is true, Statement 2 is the correct explanation for statement

D
Statement 1 is true, Statement 2 is true, Statement 2 is not the correct explanation for statement 1

Solution

Davisson – Germer experiment showed that electron beams can undergo diffraction when passed through atomic crystals. This shows the wave nature of electrons waves can exhibit interference and diffraction.
Hence, option C is correct.
Question 3
4 / -1

A sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor. The capacitance of the capacitor

A
decreases

B
remains unchanged

C
becomes infinite

D
increases.

Solution

When a sheet of aluminium foil of negligible thickness is introduced between the plates of a capacitor, the capacitance of capacitor remains unchanged.
Hence, option B is correct.