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- Question
A galvanometer can be converted to a voltmeter by connecting
Options- A. a high resistance in parallel
- B. a high resistance in series
- C. a low resistance in series
- D. a low resistance in parallel
- Correct Answer
- a high resistance in series
- 1. The transport phenomenon occurs only in _____ state of a gas and is ______
Options- A. Non-equilibrium, irreversible
- B. Non-equilibrium, reversible
- C. equilibrium, irreversible
- D. equilibrium, reversible Discuss
- 2. Transformer is a device to convert
Options- A. D.C. to A.C.
- B. Low voltage D.C. into high voltage D.C.
- C. Low voltage A.C. into high voltage A.C.
- D. Mechanical energy into Electrical energy Discuss
- 3. Bubbles of air rise up through liquids due to
Options- A. Surface tension and adherence
- B. viscosity and buoyancy
- C. air current over the liquid and buoyancy
- D. Up thrust and surface tension Discuss
- 4. The boiling point of liquids vary as
Options- A. pressure varies
- B. temperature varies
- C. volume varies
- D. density varies Discuss
- 5. Which of the following is not a unit of energy?
Options- A. Calorie
- B. Joule
- C. electron volt
- D. Watt Discuss
- 6. In the gamma decay of a nucleus
Options- A. the mass number of the nucleus changes whereas its atomic number does not change
- B. the mass number of the nucleus does not change whereas its atomic number changes
- C. both the mass number and the atomic number of the nucleus change
- D. neither the mass number nor the atomic number of the nucleus changes Discuss
- 7. The frequency of direct current is _____________
Options- A. Zero
- B. 50 HZ
- C. 60 HZ
- D. 100 HZ Discuss
- 8. In a bipolar junction transistor
Options- A. all the three regions (the emitter, the base and the collector) have equal concentrations of impurity
- B. the emitter has the least concentration of impurity
- C. the collector has the least concentration of impurity
- D. the base has the least concentration of impurity Discuss
- 9. The pressure exerted by a 760 mm column of mercury at 0° C is known as
Options- A. 1 pascal
- B. 1 atmosphere
- C. 1 bar
- D. 1 poise Discuss
- 10. Which one of the following physical quantities has the same dimensions as that of Planck?s constant h?
Options- A. Linear momentum
- B. Angular momentum
- C. Force
- D. Potential energy Discuss
Physics problems
Search Results
Correct Answer: equilibrium, irreversible
Explanation:
The transport phenomenon occurs only in equilibrium state of a gas and is irreversible.
Correct Answer: D.C. to A.C.
Correct Answer: viscosity and buoyancy
Correct Answer: pressure varies
Correct Answer: Watt
Explanation:
The watt(symbol: W) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. In dimensional analysis it is described by
Correct Answer: neither the mass number nor the atomic number of the nucleus changes
Explanation:
The emission of gamma rays does not alter the number of protons or neutrons in the nucleus but instead has the effect of moving the nucleus from a higher to a lower energy state (unstable to stable)
Correct Answer: Zero
Correct Answer: the base has the least concentration of impurity
Explanation:
In terms of concentration of impurity (a.k.a impurity doping concentration, often abbreviated to doping concentration), from the highest to the lowest among the three regions of a bipolar junction, emitter, collector, and base are the correct order. The above order is independent of the type of BJT, npn or pnp
Correct Answer: 1 atmosphere
Explanation:
1 atm: It was originally defined as the pressure exerted by 760 mm of mercury at 0 °C and standard gravity (g = 9.80665 m/s2).
Correct Answer: Angular momentum
Explanation:
In S.I. System unit of angular momentum is "joule.Second".
SI unit of Planck's constant is joule-seconds(j-s).
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