Which of the following statements is/are true for a DC motor?

1. (1) The function of the split rings is to reverse the flow of current.
2. (ii) Maximum force is experienced by arms of the coil aligned parallel to the magnetic field
3. (iii) Reversing current after every half rotation leads to continuous rotation of coil

Which of the following devices is/are based on heating effect of electric current?

1. (i) Incandescent lamp
2. (ii) Electric geyser
3. (iii) Electric generator

Q.2 Ramesh wants to choose a material for making filament of a bulb. The chosen material should possess which of the following properties?

1. (1) Low melting point
2. (ii) Ability to glow at high temperatures
3. (iii) High resistance

What is the process of generating current induced by a change in magnetic field called?

The ratio of the field due to a current-carrying circular coil of n turns to the field due to a single circular loop of the same radius carrying the same current is _________?

To investigate the conduction of electric current, Ravi performed an experiment. He took different aqueous solutions or liquids (as electrolyte) and tried to pass electricity and connected the circuit with a bulb. In the presence of which of the following, will the bulb NOT glow?

The magnetic field produced due to a circular coil carrying a current having six turns will be how many times that of the field produced due to a single circular loop carrying the same current?

A magnet, when moved near a coil, produces an induced current. Which of the following method(s) can be used to increase the magnitude of the induced current?

1. (1) Increasing the number of turm in the coil
2. (2) Increasing the speed of the magnet
3. (3) Increasing the resistivity of the wire of the coil

To connect a number of resistors in parallel can be considered equivalent to?

An AC generator works on the principle of?

The armature of an electric motor consists of which of the following parts?

1. (i) Soft iron core
2. (ii) Coil
3. (iii) Magnets

The filament of a bulb is made extremely thin and long in order to achieve?

Which of the following non-metals is a good conductor of electricity?

State two factors on which the electrical energy consumed by an electric appliance depends?

Why should an electrician wear rubber gloves while repairing an electrical switch?

A power plant where the heat required to make steam to drive turbines to make electricity is obtained by burning fuels is called?

What is the resultant resistance of 3 Ω and 6 Ω resistances connected in series?

മറ്റൊരു വസ്തുവിലെ ചാർജിൻ്റെ സാന്നിധ്യം മൂലം ഒരു വസ്തുവിലെ ചാർജുകൾക്ക് ഉണ്ടാകുന്ന പുനഃക്രമീകരണത്തെ _________________എന്നു വിളിക്കുന്നു.

രണ്ട് പ്രസ്ത‌ാവനകൾ നൽകിയിരിക്കുന്നു അവ അപഗ്രഥിച്ച്, തുടർന്ന് നൽകിയിട്ടുള്ളതിൽ നിന്നും ശരിയായത് തെരഞ്ഞെടുക്കുക :

1. പ്രസ്ത‌ാവന I വൈദ്യുതകാന്തങ്ങൾ ഉണ്ടാക്കുന്നതിന്, ഉരുക്കിനേക്കാൾ കൂടുതൽ ഉചിതമായത് പച്ചിരുമ്പാണ്.
2. പ്രസ്‌താവന II : പച്ചിരുമ്പിന് ഉരുക്കിനേക്കാൾ ഉയർന്ന കാന്തിക വശഗതയും, ഉയർന്ന കാന്തിക റിറ്റൻവിറ്റിയും ഉണ്ട്.

വൈദ്യുത ചാർജ്ജിന്റെ സാന്നിധ്യം തിരിച്ചറിയാൻ ഉപയോഗിക്കുന്ന ഉപകരണം ?

1000 W പവർ ഉള്ള ഒരു ഇലക്ട്രിക് അയേൺ എത്ര മണിക്കൂർ പ്രവർത്തിക്കുമ്പോഴാണ് ഒരു യൂണിറ്റ് വൈദ്യുതി ഉപയോഗിക്കുന്നത് ?

Of the following which one can be used to produce very high magnetic field?

Capacitative reactance is

The flux of total energy flowing out through a closed surface in unit area in unit time in electric magnetic field is

The scientific principle behind the working of a transformer is

Ohm is a unit of measuring _________

The unit of current is

Electric current is measure by

The quantity of scale on the dial of the Multimeter at the top most is :

The process of adding impurities to a semiconductor is known as:

Which part of the PMMC instrument produce eddy current damping?

What is the working principle of a two winding transformer?

A permanent magnet moving coil instrument will read :

Current is inversely proportional to:

What is the formula for calculating current?

Rheostat is the other name of:

The relation between potential difference (V) and current (I) was discovered by :

In parallel combination of electrical appliances, total electrical power

Which one is not a good conductor of electricity?

In which natural phenomenon is static electricity involved?

The electrical appliances of our houses are connected via ---------------------------------------- circuit

The fuse in our domestic electric circuit melts when there is a high rise in

The scientific principle behind the working of a transformer

Color of earth wire in domestic circuits

Electric power transmission was developed by

In electric heating appliances, the material of heating element is

The resistance of a conductor is directly proportional to :