The electricity supply in the state of Uttarakhand is identical to that of the rest of India. The voltage used in Uttarakhand is 240 Volts which alternates at 50 cycles per second. One should buy a voltage converter if the devices one is carrying do not work on 240 Volts sockets. In terms of electricity supply, the state of Uttarakhand is relatively better than other states of India.
Some of the other problems one might encounter are that of the adaptability of the equipment and the socket structure. Europe generally has 110 volt power supply so they won’t work on 230 volt power supply adaptors. One can buy adaptors from local stores and many Indian and multi national brands will be available for you. For the second problem of socket structure one can buy or hire cheap and readily available socket adaptors. They will work fine against the flat pin sockets and give you electricity from cylindrical sockets. If you want avoid hassles, you can carry these stuffs along while traveling in the state.