Which of the following units is equivalent to the unit of electric current?
A. C s−1 B. W C. J s−1 D. C Correct Answer: Option A = C s−1
An atom that emits an α-particle?
A. may become a different element. B. becomes a different isotope of the element. C. daughter with increased mass. D. becomes a daughter of a different element always. Correct Answer: Option A – may become a different element. Explanation Alpha decay or α-decay...
The handle of a screw jack is 35 cm long and pitch of the screw is 0.5 cm. What force must be applied at the end of the handle to lift a load of 2000N, if the efficiency of the jack is 30% [π = 22/7]?
A. 152.0N B. 132.0N C. 15.2N D. 440.0N Correct Answer: Option C = 15.2N
A student wishes to measure the potential difference across a resistor R. She has a galvanometer G and some connecting wires. What else does she need?
A. high-value resistor connected in parallel with G B. . low-value resistor connected in parallel with G low value C. resistor connected in series with G D. high-value resistor connected in series with G. Correct Answer: Option D – high-value resistor connected...
A metallic sphere is heated from 27°C to 200°C without change of state. Which of the following changes would have resulted from the heating?
A. No changes occur in its volume and density B. Its volume increases and its density increases C. Its volume increases and its density decrease D. Its volume increases without a change in density Correct Answer: Option C – Its volume increases and its density...Products
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