In an electric circuit, an inductor of inductance 0.5 H and resistance 50 Ω is connected to an alternating current source of frequency 60 Hz. Calculate the impedance of the circuit.

• A. 50.0 Ω
• B. 450.5 Ω
• C. 195.0 Ω
• D. 1950.1 Ω

Which of the following statements is not correct for a light ray passing through a rectangular glass block which is surrounded by air? It

• A. suffers a displacement at the point of emergence
• B. emerges parallel to the incident ray
• C. is partly reflected at the point of incidence
• D. is deviated at the point of emergence

When a lead-acid accumulator is fully charged, evolution of gases occurs at the electrodes. Name these gases and the respective electrodes at which thcy are given off.

A body moving in a circle at constant speed has i. a velocity tangent to the circle ii. a constant kinetic energy ii. an acceleration directed towards the circmference of the circle ii. an acceleration directed towards the circumference of the circle. Which of the statements above are correct?

• A. i and ii only
• B. ii and iii
• C. ii and iii only
• D. i and iii only

Current is passed through two parallel conductors in the same direction. If the conductors are placed near each other, they will------------------

• A. move in a circle
• B. repel each other
• C. remain stationary
• D. attract each other

A body of mass 36kg falls through a viscous liquid which offers a drag force of 260N on the body. The upthrust on the body at terminal velocity is? [g = 10ms²]

• A. 100N
• B. 620N
• C. 50N
• D. 310N

A resistance R is connected across the terminal of an electric cell of internal resistance 2Ω and the voltage was reduced to 3/5 of its nominal value. The value of R is

• A. 3 Ω
• B. 2 Ω
• C. 1 Ω
• D. 6 Ω

A body of mass m, has a specific heat capacity s, and a heat capacity c. If the temperature of the body changes by \(\theta^oC\), Which of the following equation is correct?

• A. ms\(\theta\) = mv^-1
• B. ms = C
• C. ms = s\(\theta\)
• D. ms = c\(\theta\)

The lower and upper fixed points of a mecury-in-glass thermometer are marked Y and 180mm respectively. On a particular the mecury meniscus in the thermometer rises to 45mm. If the corresponding reading on a scale is 10°, calculate the value of Y.

• A. 4mm
• B. 18mm
• C. 30mm
• D. 135mm

Steel is more suitable for permanent magnet than iron because the former

• A. is easily demagnetized by shaing vigorously
• B. is an alloy of many metals
• C. is easily magnetized by alternating current through one cycle
• D. retains magnetism more than iron