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JAMB UTME Physics 2009 past questions and answers

This 2009 JAMB UTME Physics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2009 set with instant marking.

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Sample JAMB UTME Physics 2009 questions

1. Two point charges of 2 microcoulombs and 3 microcoulombs are 0.30 m apart in air. What is the magnitude of the force between them? Take k = 9.0 x 10^9 N m^2/C^2.
  1. 0.60 N
  2. 0.20 N
  3. 1.8 N
  4. 6.0 N

Answer: A. 0.60 N

Coulomb's law gives F = kq1q2/r^2 = (9.0 x 10^9)(6.0 x 10^-12)/(0.30)^2 = 0.60 N.

2. Resistors of 6 ohms and 3 ohms are connected in parallel. What is their equivalent resistance?
  1. 9 ohms
  2. 2 ohms
  3. 4.5 ohms
  4. 18 ohms

Answer: B. 2 ohms

For parallel resistors, 1/R = 1/6 + 1/3 = 1/2, so R = 2 ohms.

3. A 4-ohm resistor is connected across a 12 V supply. What current flows through it?
  1. 0.33 A
  2. 2 A
  3. 3 A
  4. 48 A

Answer: C. 3 A

Ohm's law gives I = V/R = 12/4 = 3 A.

4. A device operates at 10 V and draws a current of 2 A. What is its electrical power?
  1. 5 W
  2. 12 W
  3. 18 W
  4. 20 W

Answer: D. 20 W

The power is P = VI = 10 x 2 = 20 W.

5. A uniform wire has resistance R. If its length is doubled while its material and cross-sectional area remain unchanged, what is its new resistance?
  1. 2R
  2. R/2
  3. 4R
  4. R

Answer: A. 2R

Since resistance is directly proportional to wire length at fixed material and area, doubling the length doubles the resistance.

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