1st Year Physics 3rd Quarter Book Paper

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

1. The magnetic field around a long straight current-carrying conductor is in the form of:
   1. Straight lines
   2. Concentric circles
   3. Parabolic curves
   4. Random loops
2. In Doppler's effect formula, vs represents:
   1. Speed of listener
   2. Speed of sound
   3. Speed of source
   4. Speed of medium
3. Drift velocity is produced when
   1. No electric field exists
   2. A potential difference is applied
   3. Temperature decreases
   4. Conductor is cooled
4. Electric field is related to potential gradient by:
   1. E = qΔV
   2. E = Δr/ΔV
   3. E = -ΔV/Δr
   4. E = V/r
5. The combined electric and magnetic force acting on a charged particle is called:
   1. Fleming force
   2. Coulomb force
   3. Lorentz force
   4. Maxwell force
6. High frequency sound waves bounce off blood and are used in:
   1. MRI
   2. Echocardiography
   3. X-ray
   4. ECG
7. Kirchhoff's Current Law states that:
   1. Sum of voltages in a circuit is zero
   2. Voltage is constant
   3. Current is same everywhere
   4. Sum of currents entering a junction equals sum leaving
8. If two points are at same potential, are there any electric field lines connecting them?
   1. Yes
   2. No
   3. May or may not
   4. Insufficient information.
9. When the angle between velocity and magnetic field is neither 0°, 90°, nor 180°, the particle moves in a:
   1. Circular path
   2. Straight path
   3. Helical path
   4. Zig-zag path
10. Formula of intensity in terms of power is:
    1. I = PA
    2. I = P/A
    3. I = A/P
    4. I = Pt/A
11. In the potentiometer equation E2 = (l2/l1) E1, the quantities l1 and l2 represent
    1. Current
    2. Resistances
    3. Balancing lengths
    4. Time intervals
12. Inside a Faraday cage, the electric field is:
    1. Maximum
    2. Zero
    3. Variable
    4. Constant