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Electromagnetic Waves — JEE Main Physics MCQs with Solutions
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Sample questions with solutions
Q1 — medium · theory
Two conducting circular loops A and B are
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q2 — medium · theory
field of 5000 T. When the field is changed to
A. 7 (2) 70 (3) 35 (4) 140 (1) 2 20L2 (2) 02 ✓ Correct
B. 1232 × 10–4 T (2) 176 × 10–4 T approximately :
C. 352 × 10–4 T (4) 88 × 10–4 T
D. [ML2 T–2 A–1] (2) [ML2T–3A–1] associated with the coil at an instant 15 ms
Q3 — medium · theory
An inductor coil stores 64 J of magnetic field ELECTROMAGNETIC INDUCTION
A. 0.4 (2) 0.8 (3) 0.125 (4) 0.2 ✓ Correct
B. Outward and decreasing with time
C. (2) Parallel to the plane of coil and decreasing
D. Outward and increasing with time
Q4 — medium · numerical
A long solenoid of radius R carries a time (t) between t = 0 and t = tC (tC is the time
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q5 — medium · theory
(1) 24-2. (2) ANSWER KEY 22-1. (3) 22-2. (4)
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q6 — medium · numerical
������ = Mi = BA centre 4 0i (2 sin 45º ) 2 20i
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q7 — medium · numerical
B = 0nI = 4 × 10–7 × 70 × 102 × 2
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q8 — medium · theory
A coil is placed perpendicular to a magnetic
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q9 — medium · theory
constant of the circuit) is :
A. Direction of IR remains unchanged and VR ABCDEFA as shown, where rectangle ✓ Correct
B. Direction of IR remains unchanged and VR each other. If the sides of the rectangles are
C. At t = 0.5 direction of IR reverses and VR direction of magnetic moment of the loop
D. At t = 0.25 direction of IR reverses and VR
Q10 — medium · theory
closed circuit of resistance 8 varies with 22-5. In the given figure, an inductor and a resistor
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q11 — medium · theory
3 23-3. 9 20-5. (2) 23-5. 25 22-5. 4
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q12 — medium · theory
������ i 4 L L
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q13 — medium · theory
R
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q14 — medium · theory
0 [sin90
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q15 — medium · theory
Magnetic field BC at center 2vD vP
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q16 — medium · theory
A small square loop of wire of side l is placed
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q17 — medium · theory
A constant magnetic field of 1 T is applied in
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q18 — medium · numerical
time (in seconds) as = 5t2 – 36t + 1. The 22-7. E volt. E a J / s represents the maximum rate
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q19 — medium · theory
(3) 22-4. (3) 21-2. (3) 21-3. (3)
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q20 — medium · theory
(4) 20-4. (2) 21-1. (4) 20-6. (4) 20-7. (1)
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q21 — medium · numerical
= 176 × 10–4 T
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q22 — medium · numerical
While entering flux increases so negative l = l0t – l0t2
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q23 — medium · theory
Total magnetic field
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q24 — medium · theory
1 x x 250
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q25 — medium · theory
A rectangular loop of sides 12 cm and 5 cm,
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q26 — medium · theory
22-8.
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q27 — medium · theory
(1) 21-5 (2) 23-1. (2) 20-1. (3) 20-2. (3)
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q28 — medium · numerical
induced emf 20-2. = (0nl) × (R2)
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q29 — medium · theory
R C 0
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D
Q30 — medium · theory
parallel to y-axis.
A. Option A ✓ Correct
B. Option B
C. Option C
D. Option D