Which effect of electric current is used in electroplating?

Why is tungsten metal selected for making filaments of incandescent lamps?

What is the equivalent resistance of resistors $R_{1}$ and $R_{2}$ connected in parallel connection?

Find out the following in the electric circuit given in the figure:
$(a)$ Effective resistance of two $8\, \Omega$ resistors in the combination.
$(b)$ Current flowing through $4\, \Omega$ resistor.
$(c)$ Potential difference across $4\, \Omega$ resistor.
$(d)$ Power dissipated in $4\, \Omega$ resistor.
$(e)$ Difference in ammeter readings,if any.

If a copper layer has to be deposited on a steel spoon by electroplating,where should the copper rod be connected?

An electric refrigerator rated $400 \ W$ operates $8 \ h$ per day. What is the cost of the energy to operate it for $30$ days at ₹ $3.00$ per $kWh$?