Physics - Online Test
Q1. In an oscillating LC circuit, the maximum charge on the capacitor is Q. The charge on the capacitor when the energy is stored equally between the electric and magnetic fields is
Answer : Option C
Explaination / Solution:
Q2. Which of the following is NOT true for electromagnetic waves?.
Answer : Option D
Explaination / Solution:
No Explaination.
Q3. Two metallic spheres of
radii 1 cm and 3 cm are given charges of -1 x 10-2 C and 5 x
10-2 C respectively. If these are connected by a conducting wire,
the final charge on the bigger sphere is
Answer : Option A
Explaination / Solution:
Q4. Emission of electrons by the absorption of heat energy is called………emission.
Answer : Option C
Explaination / Solution:
No Explaination.
Q5. In Joule’s heating law,
when I and t are constant, if the H is taken along the y
axis and I2 along the x axis, the graph is
Answer : Option A
Explaination / Solution:
Q6. A system consists of N0 nucleus at
t=0. The number of nuclei remaining after half of a half-life (that is, at time
t = 1/2 T1/2)
Answer : Option B
Explaination / Solution:
N
= (1/2)n (N0)
For
this case, n = (1/2)
So,
N = N0/√2
Q7. A simple pendulum with charged bob is oscillating with time period T and let θ be the angular displacement. If the uniform magnetic field is switched ON in a direction perpendicular to the plane of oscillation then
Answer : Option C
Explaination / Solution:
Hint: Both T θ and decreases as B increases.
Q8. The variation of frequency of carrier wave with respect to the amplitude of the modulating signal is called ------------------
Answer : Option B
Explaination / Solution:
No Explaination.
Q9. 20/π2 H inductor
is connected to a capacitor of capacitance C. The value of C in order to impart
maximum power at 50 Hz is
Answer : Option D
Explaination / Solution:
Q10. The electric and magnetic fields of an electromagnetic wave are
Answer : Option A
Explaination / Solution:
No Explaination.
