Physics - Mock Test 32

Question 311

Electromagnetic waves emitted from antenna are?

A) Stationary B) Longitudinal C) Transverse D) All the above

---

No Details

Question 312

Electromagnetic waves transport?

A) Energy B) Momentum C) Mass D) Heat

---

No Details

Question 313

A changing magnetic flux produces around itself an induced?

A) Magnetic field B) Electric field C) Electromagnetic force D) Artificial gravitational field

---

No Details

Question 314

An alternating current or voltage?

A) fluctuates off and on B) varies in magnitude alone C) changes its direction again and again D) changes its magnitude harmonically and reverses its direction of flow after regularly recurring intervals.

---

No Details

Question 315

Terminal potential difference of a battery is greater than its emf when?

A) the internal resistance of battery is infinite B) the internal resistance of battery is zero C) the battery is charged D) the battery is discharged

---

No Details

Question 316

A fuse is placed in series with the cireuit to protect against?

A) high power B) high voltage C) high current D) over heating

---

No Details

Question 317

Electrical energy is converted to heat at the rate of?

A) IRt B) I2R C) I2Rt D) VIt

---

No Details

Question 318

All electrical appliances are connected in parallel to each other between the main line and neutral wire to get?

A) same current B) same current and potential difference C) different current but same potential difference D) different current and potential differences

---

No Details

Question 319

Why should a resistance be introduced in a circuit in series deliberately?

A) to increase current B) to decrease current C) to control current D) just to give a good look to circuit

---

No Details

Question 320

The resistance of a conductor at absolute zero (OK) is?

A) zero almost B) infinite almost C) no prediction at all D) may increase or decrease

---

No Details