Question
Cathode rays and canal rays produced in a certain discharge tube are deflected in the same direction if(a) A magnetic field is applied normally(b) An electric field is applied normally(c) An electric field is applied tangentially(d) A magnetic field is applied tangentially
   
   

Answer

(a) A magnetic field is applied normally

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

An e.m.f. of 100 millivolts is induced in a coil when the current in another nearby coil becomes 10 ampere from zero in 0.1 second. The coefficient of mutual induction between the two coils will be(a) 1 millihenry(b) 10 millihenry(c) 100 millihenry(d) 1000 millihenry
       
The magnetic field in a coil of $100$ turns and $40$ square $cm$ area is increased from $1$ Tesla to $6$ Tesla in $2$ second. The magnetic field is perpendicular to the coil. The $\text{e.m.f.}$ generated in it is
An alternating voltage $\text{E}=50\sqrt{2}\sin(100\text{t})$ V is connected to a $1\mu\text{F}$ capacitor through an ac ammeter. What will be the reading of the ammeter?
Two resistors are connected (a) in series (b) in parallel. The equivalent resistance in the two cases are 9 ohm and 2 ohm respectively. Then the resistances of the component resistors are(a) 2 ohm and 7 ohm(b) 3 ohm and 6 ohm(c) 3 ohm and 9 ohm(d) 5 ohm and 4 ohm
       
A river is flowing from west to east at a speed of 5 metres per minute. A man on the south bank of the river, capable of swimming at 10 metres per minute in still water, wants to swim across the river in the shortest time. He should swim in a direction:
  1. Due north.
  2. 30° east of north.
  3. 30° north of west.
  4. 60° east of north.
Choose the correct option about light.
A 100 V voltmeter of internal resistance 20 kQ in series with a high resistance R is connected to a 110 V line. The voltmeter reads 5 V, the value of R is(a) 210 kΩ(b) 315 kΩ(c) 420 kΩ(d) 440 kΩ
       
The antiparticle of electron is:
Earth's magnetic field always has a horizontal component except at or Horizontal component of earth's magnetic field remains zero at
 
Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an adiabatic process.
  1. Q = 0
  2. W = 0
  3. Q = W
  4. Q ≠ W