1. In a practical experiment using a solenoid to study the magnetic
field, what is typically used to detect the magnetic field lines?
A. Iron filings
B. A magnetometer
C. A galvanometer
D. A compass needle
Answer: A) Iron filings
Rationale: Iron filings are used to visualize the magnetic field lines
around the solenoid by aligning themselves with the field.
2. In an experiment on the capacitance of a capacitor, what is the
relationship between charge and potential difference?
A. Directly proportional
B. Inversely proportional
C. Exponential
D. Logarithmic
Answer: A) Directly proportional
Rationale: The charge on a capacitor is directly proportional to the
potential difference across it, as described by the equation
𝑄
,=
𝐶
×
𝑉
Q=C×V.
3. In a laboratory experiment measuring the resistance of a conductor
using a Wheatstone bridge, what should be balanced to find the
unknown resistance?
A. The currents in the bridge
B. The voltages across the resistors
C. The resistances in the two arms of the bridge
D. The temperature of the resistors
Answer: C) The resistances in the two arms of the bridge
Rationale: The Wheatstone bridge is balanced when the ratios of the
resistances in the two arms are equal, allowing for the calculation of the
unknown resistance.
4. In the experiment to determine the focal length of a convex lens
using a distant object, what is the method of finding the image?
A. By adjusting the lens until the object is in focus on the screen
B. By adjusting the screen to obtain a clear image
C. By using a magnifying glass
, D. By using an additional lens for magnification
Answer: B) By adjusting the screen to obtain a clear image
Rationale: To determine the focal length, the object must be far enough
away, and the image should be focused on a screen by adjusting the
screen position.
5. What equipment is used to measure the thickness of a wire in a
resistivity experiment?
A. Vernier caliper
B. Ruler
C. Micrometer screw gauge
D. Thermometer
Answer: C) Micrometer screw gauge
Rationale: A micrometer screw gauge is used to measure the small
diameter of the wire with high precision, which is needed for
calculating its resistivity.
6. In a practical experiment to determine the focal length of a concave
mirror using a candle and screen, what is the appropriate distance
between the mirror and the object?
A. Equal to the focal length
B. Less than the focal length
C. More than the focal length
field, what is typically used to detect the magnetic field lines?
A. Iron filings
B. A magnetometer
C. A galvanometer
D. A compass needle
Answer: A) Iron filings
Rationale: Iron filings are used to visualize the magnetic field lines
around the solenoid by aligning themselves with the field.
2. In an experiment on the capacitance of a capacitor, what is the
relationship between charge and potential difference?
A. Directly proportional
B. Inversely proportional
C. Exponential
D. Logarithmic
Answer: A) Directly proportional
Rationale: The charge on a capacitor is directly proportional to the
potential difference across it, as described by the equation
𝑄
,=
𝐶
×
𝑉
Q=C×V.
3. In a laboratory experiment measuring the resistance of a conductor
using a Wheatstone bridge, what should be balanced to find the
unknown resistance?
A. The currents in the bridge
B. The voltages across the resistors
C. The resistances in the two arms of the bridge
D. The temperature of the resistors
Answer: C) The resistances in the two arms of the bridge
Rationale: The Wheatstone bridge is balanced when the ratios of the
resistances in the two arms are equal, allowing for the calculation of the
unknown resistance.
4. In the experiment to determine the focal length of a convex lens
using a distant object, what is the method of finding the image?
A. By adjusting the lens until the object is in focus on the screen
B. By adjusting the screen to obtain a clear image
C. By using a magnifying glass
, D. By using an additional lens for magnification
Answer: B) By adjusting the screen to obtain a clear image
Rationale: To determine the focal length, the object must be far enough
away, and the image should be focused on a screen by adjusting the
screen position.
5. What equipment is used to measure the thickness of a wire in a
resistivity experiment?
A. Vernier caliper
B. Ruler
C. Micrometer screw gauge
D. Thermometer
Answer: C) Micrometer screw gauge
Rationale: A micrometer screw gauge is used to measure the small
diameter of the wire with high precision, which is needed for
calculating its resistivity.
6. In a practical experiment to determine the focal length of a concave
mirror using a candle and screen, what is the appropriate distance
between the mirror and the object?
A. Equal to the focal length
B. Less than the focal length
C. More than the focal length
